Method for fixing a winding to an electronic circuit

ABSTRACT

The fixing process according to the invention of a winding to one or more electronic circuits permits elimination of an important manufacturing step of the processes according to the prior art, whether the positioning, then the gluing or the precise fixing of the winding or of the core to be wound on the electronic circuit or circuits.  
     By a suitable arrangement of the electronic circuit or circuits ( 20 ) and of the possible core ( 23 ), independently of one another, on a holding tool according to the invention, a semi-finished product ( 2 ) is obtained, also according to the invention, made up of said circuit or circuits and said winding, the mechanical connection between them being ensured solely by the copper wires producing, moreover, the electrical connection between the two elements.  
     The finished component according to the invention will be obtained by disposing the preceding semi-finished product on a support ensuring a permanent mechanical connection between the two elements.

[0001] The present invention relates to the making of electroniccomponents of very small dimensions, and in particular to thoseincluding a winding connected to one or more electronic circuits, ormore precisely to one or more chips or integrated circuits or printedcircuits or discrete electronic elements. Electronic circuit will bespoken of hereafter in the description, it being well understood thateach time it may have to do with one or the other of the elementsmentioned above.

[0002] Certain problems are encountered at the time of making suchcomponents, caused mainly by the very small dimensions of the elementsin question; indeed, the type of electronic circuit involved here hastypical dimensions on the order of 1 mm×1 mm×0.5 mm and a typical masson the order of 4 mg, whereas the coil core, for one of the embodimentsconsidered, has a diameter on the order of 0.8 mm and a length of about5 mm, and the copper wire used for winding has a typical diameter of0.020 mm over enamelled insulation.

[0003] When producing such a component conventionally, it is necessaryto fix the electronic circuit or circuits to the core before the windingof the latter, the fixing in position of one of these elements relativeto the other having to be done with great precision so that the ends ofthe winding wires may be brought safely opposite the metal pathsdisposed on the electronic circuit in order to be soldered there, on anautomatic winding machine. Such a component according to the prior artis described in the application EP-A-0.405.671, where it is seen thatthe circuit or circuits are first fixed to a specially shaped portion ofthe core.

[0004] The fixing process according to the invention proposes to get ridof this drawback by eliminating the intermediate step consisting infirst fixing the core to be wound to the electronic circuit. Theelimination of this delicate step greatly facilitates the production ofsuch components by making it possible to avoid soiling the tool or theproduction machine with glue and, moreover, by making use of a toolmanufactured with precision, permits doing away with the necessity ofhaving precise positioning of the various elements before they aredisposed on the winding tool.

[0005] A first object of the invention is therefore to propose a windingprocess by which, in particular, the electronic circuit or circuits areheld independently of the winding, appropriate guide means guiding thewinding wire so that it passes directly above metal paths of theelectronic circuit or circuits. Another object of the invention is thatthe process may preferably be applied to an automatic winding machineprovided with a “flyer”-type pay-out reel. Another object of theinvention is that the preceding process may be applied to a windingcarried out on a core as well as to a winding carried out on a falsecore, thus permitting an air-core coil to be obtained. Other objects ofthe invention are that the soldered joints of the wires on the circuitsmay take place along a plane parallel to the axis of the core, and thatdifferent possibilities may be envisaged for withdrawing the componentfrom the machine after winding.

[0006] In order to achieve these different objects, the winding processaccording to the invention answers the characteristics of claims 1 to 7.

[0007] Another object of the invention is to propose a tool permittingthe preceding process to be carried out, capable of holding thedifferent electronic circuits and the winding independently of oneanother and comprising guide means capable of bringing the winding wiresafely to the suitable locations for soldering and winding.

[0008] This object is obtained by a specially designed holding toolanswering the characteristics of claims 8 to 11.

[0009] And finally, another object of the invention is to propose acomponent, comprising a winding and at least one electronic circuit,without any rigid mechanical connection between the winding and theelectronic circuit or circuits, produced especially by the process andwith the aid of the tool mentioned above, this component capable ofbeing considered a semi-finished product and so answering thecharacteristics of claim 12 and being capable of then being terminatedaccording to several embodiments in conformity with the characteristicsof claims 13 to 24.

[0010] This invention is more particularly understandable starting fromthe appended drawing with the figures where:

[0011]FIG. 1 represents a top view of a first embodiment of a holdingtool according to the invention,

[0012]FIG. 2 represents a longitudinal section along the line II-II ofthe holding tool of the preceding figure,

[0013]FIG. 3 represents a top view of another embodiment of a holdingtool according to the invention,

[0014]FIG. 4 represents a longitudinal section along the line IV-IV ofthe holding tool of the preceding figure,

[0015]FIG. 5 represents still another embodiment of a holding toolaccording to the invention,

[0016]FIG. 6 represents a component according to the invention in theform of a semi-finished product, and

[0017]FIGS. 6A, 6B, 6C, 6D, and 6E represent other embodiments of afinished component.

[0018]FIG. 7 represents another embodiment of a finished component, and

[0019]FIG. 8 represents still another embodiment of a finishedcomponent.

[0020] A holding tool 1, according to a first embodiment of theinvention, is depicted in FIG. 1; it is rather similar to that describedin patent application CH 552/91-9; it differs therefrom, whichconstitutes the invention, in the system of holding the electroniccircuit and the core independently, as will be seen below. The tool 1has a general clamp shape and comprises a first nose 10, generally afixed nose, and a second nose 11, generally a movable nose, being ableto move away from one another, preferably in parallel direction, or tomove together leaving an intermediate space 12 between the two insidefaces 10A and 11A of said noses, as well as guide means, here made up oftwo guide points 13 and 14, each of them being disposed on a rearportion of the upper face of the movable nose 11 and of the fixed nose10, respectively. The holding tool 1 is intended to hold the component 2made up of an electronic circuit 20, comprising two metal paths 21 and22, and of a core 23 intended to receive the winding 24. To hold thecircuit 20 and the core 23, the front end of the inside face 10A of thefixed nose 10 includes a cavity 10B, the rear part of which is notcompletely hollowed out but includes a support portion 10C in theprolongation of the lower part of the nose 10. The width of the cavity10B is slightly less than the width of the electronic circuit 20 andapproximately equal to the diameter of the core 23, whereas thethickness of the support portion 10C remaining in the rear part of saidcavity is such that the upper face of the electronic circuit 20 is flushwith the upper face of the nose 10 when said circuit is disposed on saidsupport portion, as is visible in FIG. 2, which is a section along theaxis II-II of the preceding figure. The electronic circuit 20 as well asthe core 23 are disposed independently of one another in the tool 1,either manually or automatically, by suitable automatic loading devices.

[0021] It will be noticed that, in the two figures, the length of thesupport portion 10C is slightly less great than the length of theelectronic circuit 20 when the latter rests against the rear face of thecavity 10B. The front face of the support portion 10C serves as a stopagainst which the end of the core 23 comes to rest. Thus, the core 23 isseparated from the electronic circuit 20 by a small space correspondingto the difference between the length of the support portion 10C and thelength of the electronic circuit 20, within the positioning tolerances.To hold the core 23 in position, the front end 11B of the movable nose11 includes a concave cavity coming to rest against a cylindricalportion of the core 23, whereas the electronic circuit 20 is held at theback of the cavity 10B by a blade spring 15, the rearward end of whichis fixed to the inside face 11A of the movable nose 11. The fact ofholding the two elements 20 and 23 between the two noses of the toolindependently of one another is novel and forms part of the invention.

[0022] The winding 24 is preferably produced with the aid of a “Flyer”(not shown). The winding wire 25 is brought by the “Flyer,” which makesit pass behind the first guide point 13, then above the first metal path21, in order to effect the winding 24 about the core 23, beforewithdrawing the wire above the second metal path 22 and behind thesecond guide point 14 to carry it away toward the following holdingtool. Next, the two portions of wire situated directly above each of themetal paths 21 and 22 are soldered to said paths by an automaticsoldering apparatus (not shown) which takes off the enameled insulationfrom the portion of wire in question at the same time as it undertakesthe soldering. A transfer device (not shown) can now come to take thecomponent 2, seizing it preferably by the core 23, or by the electroniccircuit 20, and withdraw it from holding tool 1 after opening of themovable nose 11 and cutting or tearing of the wire ends before thesoldering carried out on the metal path 21 and after that carried out onthe metal path 22. Because of the relative positions of the two guidepoints 13 and 14, mutually and with the circuit 20, as shown in FIG. 1,the wire arriving to be wound and the one leaving after winding cross ata point situated between the circuit 20 and the winding 24; it would bejust as possible to dispose these different elements in such a way thatthe crossing of the two wires is situated outside the component 2. Themanner of producing the winding 24 described here corresponds to apreferred manner; certain variants in the way of using the “Flyer” maybe found, particularly by assisting it with auxiliary fingers or guidehooks as need be.

[0023] A second embodiment of a tool 1 according to the invention isdepicted in FIGS. 3 and 4, where it is applied to the manufacture of anair-core winding to which an electronic circuit 20 is added. For thisembodiment of the holding tool, the cavity 10B in which the circuit 20is lodged holds said circuit on three side faces, while an extension ofthe movable nose 11 comes to hold the fourth side face. As is seen inFIG. 4, the thickness of the extension of the movable nose 11 coming tolean against the circuit 20 is approximately equal to that of thecircuit, as a result of which the bottom of the circuit 20 can leanagainst a plane bottom part of the seat 10B. In this embodiment, themovable nose 11 serves only to hold the circuit 20 in its seat via itsextension. In the case of the making of an air-core winding, i.e.,without a core, it is necessary to have a false core as depicted, forexample, at 16, made up of a first fixed flange 16A, fixed to the end ofthe nose 10, of a second movable flange 16B, of a bobbin 16C, notnecessarily of circular cross-section, fixed either to the fixed flange16A or to the fixed [sic] flange 16B, and of fixing means 16D permittingthe movable flange 16B, as well as the bobbin 16C, to be made integralwith the fixed flange 16A. Guide means 16E, for example one or morenotches, may be disposed on a portion of the circumference of the fixedflange 16A in order to guide the winding wire 25. Preferably, the notchor notches 16E have a suitable shape, in principle three-dimensional, inorder to guide the wire correctly and dependably at the time of itsarrival on the winding and at the time of its withdrawal.

[0024] Besides the modifications mentioned above, the tool 1 furthercomprises another modification as compared with the first embodimentdescribed earlier. One notices in the figure that instead of the twoguide points 13 and 14 of FIG. 1, the tool 1 depicted here comprisesonly a single guide point 17 serving to guide the wire 25 both at thetime of its arrival on the tool 1 and at the time of its leaving. Inorder that the guidance may be correct, and that the two portions ofwire overhanging the metal paths 21 and 22 may be parallel, the diameterof the point 17 will preferably be equal to the space between axesbetween the two metal paths 21 and 22.

[0025] The winding operation is carried out similarly to what has beendescribed previously, the wire 25 being brought onto the tool 1 behindthe point 17, passing next above the metal path 21 of the circuit 20,then through the notch or the first notch 16E, next to be wound aroundthe bobbin 16C, between the two flanges 16A and 16B, then to bewithdrawn through the notch or the second notch 16E, to pass above themetal path 22, then behind the point 17. When the soldered joints aremade on the metal paths 21 and 22, when means for gluing or fixing theturns of the winding 24 have been used in order to join the turnstogether and when the ends of the wires respectively disposed before thejoint of the path 21 and after that of the path 22 have been torn off,it suffices to withdraw the movable flange 16B by acting upon the fixingmeans 16D, then to withdraw the assembly composed of the winding 24 towhich the circuit 20 is fixed by means of the two winding wire endssoldered to the paths 21 and 22. These last operations may be carriedout manually or by automatic means. It is then possible, by mechanicalmeans or manually, to force the circuit 20 back into the same plane asthe winding 24, possibly within the empty space disposed within thewinding 24.

[0026]FIG. 5 shows still another embodiment of a tool 1, intended fordisposing several circuits 20, 20A . . . simultaneously on a winding 24.In this case, the seat 10B provided in the fixed nose 10 is dimensionedfor receiving several circuits, two in the case represented, disposedone behind the other on the principal longitudinal axis of the tool 1.Spacing means 10D, possibly retractable, may be provided in said seat sothat a free space subsists between the circuits. It is an advantage ofthe embodiment of the tool 1 comprising only a single guide point 17 tohave a portion of said tool above which the ends of the wires 25entering and leaving the winding are disposed mutually parallel. Whendisposing several circuits 20, 20A, . . . on this tool portion, it istherefore easy to make the winding wire pass successively above severalmetal paths 21, 21A, . . . at the time of the intake of the wire, thenonce more over several paths 22, 22A, . . . at the time of itswithdrawal.

[0027] The tool 1 is represented here to be used for producing a winding24 on a core 26 comprising a core base and two flanges. This core 26 maybe made of any material according to the use to be made of it, it may beof synthetic material, magnetic or not, rigid or flexible. Since thecore base is preferably hollow, a tenon 18 may be provided on the end ofthe nose 10, disposed along the principal axis of the tool 1, and ontowhich it is possible to slip the core 26. Additional means for guidingthe wire 25 in order to dispose it suitably on the core 26 may beprovided, for example two or four possibly profiled points 19, disposedat the end of the nose 10 or one or two grooves 26A of suitable shapedisposed on a portion of the flange of the core 26 in contact with thenose 10.

[0028] The way of carrying out the winding 24 and the soldered joints onthe circuits is absolutely similar to what has been describedpreviously.

[0029] Different embodiments of the holding tool have been described forthe execution of different embodiments of windings. It is wellunderstood that certain ones of the variants described are generallyindependent of one another and that it is possible to choose the onewhich is best adapted to the needs. For example, the ends of the fixedand movable noses of FIG. 1 are particularly adapted for smallcylindrical cores, whereas the modes of fixing the coil by a tenon 18,as in FIG. 5, or by a false coil form 16, as in FIG. 3, dependessentially on the type of winding to be produced. Likewise, theembodiment according to which the guide means are composed of only asingle point 17, as in FIG. 5, is particularly adapted to the caseswhere there is a component comprising more than one circuit 20. On theother hand, the mode of holding the circuit 20, with or without spring15, may be chosen for any embodiment. The auxiliary guide means, points19 and/or profiled grooves 16E or 26A, are chosen according to theneeds.

[0030] It is thus seen that by the process and the tool according to theinvention, it is possible to produce a component according to theinvention made up of a winding of fine wire of any known type, connectedto one or more electronic circuits, the characteristic common to allthese components being that, at this stage of manufacture, the windingand the circuit or circuits are held together mechanically only by theconnection wires which join them. This effect is possible solely owingto the very low mass of the electronic circuit and to the mechanicalresistance of the connection wires, which is sufficient despite the verysmall diameter of said wires.

[0031] Another advantage of the process and of the tool according to theinvention is that the operation of soldering the fine wire on the metalpaths can take place in a plane parallel to the axis of the coil,generally in a horizontal plane; for the usual winding machines, thisfacilitates the soldering operation. However, there is nothing toprevent analogously disposing the circuit or circuits 20 along avertical plane in case there is a machine carrying out the solderedjoints along a vertical plane.

[0032] One or more electronic circuits 20, 20A, . . . are mentioned inthe description; it may be a question, as mentioned above, either of aminiaturized complete integrated electronic circuit or else of a simpleelectronic element, as, for example, a capacity [sic] or even of aminiature printed circuit. In case several circuits are assembled, theremay be, for example, identical or different circuits or a circuit and anelectronic element or even identical or different electronic elements.The characteristics common to these parts are a very small size andmass, as well as the fact that two metal contact paths are accessible onone face of each of said parts.

[0033] Generally, the components 2 made up of a winding connected to oneor more circuits cannot be used as is but must be packaged. For example,the miniature winding 24 connected to the circuit 20, as depicted inFIG. 1, must be considered a semi-finished product, whether a componentaccording to the invention as shown in FIG. 6, made up of a core 23 onwhich the winding 24 is produced, the two ends of the winding wiresbeing soldered on the metal paths 21 and 22 of an electronic circuit 20.The only connection between the electronic circuit 20 and the core 23 ismade via said ends of the winding wires which thus ensure both theelectrical connection between the two elements and the mechanicalconnection between these same two elements. In view of the very low massof the electronic circuit 20, the mechanical rigidity offered by the twoconnection wires is sufficient to support one or the other of saidelements when the complete component is held by the other of saidelements, the core 23 or the circuit 20. In view of the slight spacingprovided between them at the time of the placing of the circuit 20 andof the core 23 on the tool 1, there exists no tensile stress on thewires due to a poor positioning of one of the elements relative to theother.

[0034] It is obvious that in such dimensions, the mechanical connectionensured by the connection wires can be only a temporary connection andcannot be a permanent connection; it is nevertheless sufficient to makeit possible to eliminate a first stage of fixing the electronic circuit20 to the core 23, the elimination of said stage of the manufacturingprocess permitting a substantial saving of time and money.

[0035] To finish the manufacture of the complete component according tothe invention, it now suffices to encapsulate said component in order toprotect it from mechanical shocks and from soiling, to ensure a durablemechanical connection between the two elements, and to give it a sizeallowing it to be handled better. Several possibilities exist for thispurpose; in FIG. 6A the component has been introduced into a glassmini-tube 30 closed at one end, containing a certain quantity of aliquid 31 capable of hardening, for example by polymerization under theeffect of an exposure to an UV radiation, or else a two-component liquidhardening when the two components are combined, in order to fix the twoelements together and to the tube 30. The tube 30 is then hermeticallysealed by fusion or by a sealing product 32. According to anotherembodiment of the finished product visible in FIG. 6B, the two elementsof the component 2 are simply disposed on a rigid support 33 on whichthey are glued; they are made integral with one another via said rigidsupport. The assembly may or may not be covered, partially orcompletely, with a protective coating. According to a third embodimentvisible in FIG. 6C, the component 2 is simply covered with an overlaycoating 34 which ensures its mechanical hold. A fourth possibleembodiment of the finished component is shown in FIG. 6D; in this case,the component has been placed between two independent portions 35A and35B of a flexible sheet of synthetic material, the free edges 36 of saidportions then being sealed together in any suitable manner, by thermaleffect, by gluing, by crimping, etc. The envelope according to thisembodiment may be contrived starting from a folded sheet in order toobtain the two portions 35A and 35B, only three free edges 36 beingsealed, or else from two separate portions 35A and 35B of which the fourfree edges 36 are sealed, or even from a tube made up of a sheet rolledup and already closed along one generatrix, the two free edges 36 to besealed being constituted by the ends of the tube. In order that thecomponent cannot move between the two portions of sheets 35A and 35B,the sealing takes place as close as possible to the component, or else avacuum is created between the two portions of sheets before sealing, sothat the component is held firmly in its envelope. Even though theenvelope-forming sheet is made up of a thin and flexible material, as aresult of the small size of the component, or of its envelope,respectively, the component is held in its envelope in a sufficientlyrigid manner.

[0036] One advantage of this last embodiment of the envelope of acomponent is visible in FIG. 6E, where a plurality of components 2assembled in a chain are seen. The components 2 are disposed side byside with a free space between them, between two flexible strips 35A and35B, sealings 36, preferably welds, are made around the component inorder to seal the component 2 within a fluid-tight envelope made up oftwo portions of the strips 35A and 35B connected by the sealings 36.Thus, the envelopment may take place by automatic means, the storage ofthe finished parts is facilitated thereby since it is easier to store astrip comprising a known number of elements rather than this same numberof individual elements; it is very easy to obtain one or more individualfinished elements since it then suffices to cut the strip, manually orby automatic means, between two consecutive welds situated in the spaceseparating two components. Individual hooking or fixing means may easilybe added to envelopes made up of thin sheets, for example one or moreholes 37 contrived on one or more portions of the strip preferablydisposed outside of the sealed part, thus permitting each component tobe fixed to any other structure.

[0037] As concerns the other winding embodiments described, the means ofmaking the component rigid will be adapted to the type of coil and toits use; they will generally be less critical than for the firstembodiment seen above, owing to the larger size of the coil. Forexample, for the air-core coil obtained by the tool of FIGS. 3 and 4,which might be intended to be inserted in an envelope in the shape andsize of a credit card, the electronic circuit or circuits will first ofall be forced back into the plane of the winding, possibly within thefree space within the winding, manually or by mechanical means, bypassages in a guiding slide of appropriate shape, or by an air jet, thenthe whole will be covered between two synthetic sheets, preferablysemi-rigid or rigid, as is seen in FIG. 7 where the upper covering sheetis taken away in order to distinguish the positioning of the component.

[0038] For the semi-finished product manufactured by the tool accordingto FIG. 5, it generally suffices as previously to fold up the connectionwires in order to bring the circuit or circuits 20, 20A . . . into aplane parallel to the flange of the coil 26 as depicted in FIG. 8.According to the needs, it is thereafter possible to fix the circuit orcircuits to said flange, by gluing for example. If the coil corecomprises an accommodation of sufficient size, it is also possible topress the circuit or circuits back there and possibly to glue them therein order to ensure their mechanical protection.

[0039] As is seen in all the figures, the relative position of theelectronic circuit 20 and the coil 24 is not important, the play betweenthese two elements being limited only by the available length of theconnection wires. Later, this component will form part of a largerelectronic circuit, its excitation being ensured by electromagneticfield.

[0040] Diverse variants of the products mentioned above may beenvisaged; in particular, it is not absolutely necessary for theelements to have the dimensions and masses mentioned; it suffices, toanswer the characteristics of the invention, that the mechanical holdwhich can be offered by the connection wires be sufficient to ensure atemporary mechanical connection between elements, the dimensions andmasses of which may be appreciably greater than indicated. Furthermore,as indicated previously, the electronic circuit in question may takedifferent forms; it may also concern an integrated circuit, a simplediscrete electronic component, or a printed circuit. Moreover, only afew possibilities of finishing the component have been described, it iswell understood that said component may be finished in many other waysaccording to the needs.

[0041] Thus, by the process and the holding tool according to theinvention, it is possible to obtain a semi-finished product and afinished product according to the invention, having the same operatingqualities as those of the prior art, but the manufacture of which isappreciably simplified to the extent that soiling due to the glue on thetool or the machine is avoided, and that moreover it is no longernecessary to carry out an operation of assembling two or more elementsnecessitating great precision, said precision being transferred to themaking of the tool according to the invention.

1. Process for producing a winding (24) and for fixing said winding toat least one electronic circuit (20, 20A, . . . ), characterized in thatit comprises particularly the following steps: placement of at least oneelectronic circuit comprising at least two accessible metal paths (21,22, 21A, 22B, . . . ), on a holding tool (1), bringing a winding wire(25) on one side of guide means (13; 17) disposed on one face of saidtool, then above a first metal path (21, 21A, . . . ) of the electroniccircuit or circuits, producing the winding with said winding wire,withdrawal of the winding wire above a second metal path (22, 22A, . . .) of the electronic circuit or circuits, then by another side of saidguide means (14; 17), soldering each of the portions of wires situateddirectly above each of said metal paths to the corresponding metal path,opening of the tool and withdrawal of the component made up of saidelectronic circuit or circuits connected to each other and to thewinding solely by the two winding end wires soldered on the metal pathsof said electronic circuit or circuits.
 2. Process according to claim 1, characterized in that the winding is carried out with the aid of aflyer.
 3. Process according to one of the claims 1 or 2, characterizedin that the winding is carried out about a core (23; 26), held by saidtool independently of said electronic circuit or circuits.
 4. Processaccording to one of the claims 1 or 2, characterized in that the windingis carried out about a false core (16C) fixed to said tool.
 5. Processaccording to one of the claims 3 or 4, characterized in that thesoldered joints are carried out when the metal paths are disposed in aplane parallel to the axis of the winding.
 6. Process according to claim5 , characterized in that the withdrawal of the component is effected byseizing the winding or the wound core.
 7. Process according to claim 5 ,characterized in that the withdrawal of the component is effected byseizing at least one electronic circuit.
 8. Holding tool for theexecution of a process according to one of the preceding claims,characterized in that it comprises a first fixed nose (10) and a secondnose (11) movable in relation to the first nose, a space (12) remainingbetween two inner faces (10A, 11A) of said noses when the latter are inclose position, said noses comprising first positioning means (10B, 10C;10D) for at least one electronic circuit (20, 20A) arranged near thefront end of the first nose (10), the upper surface of said electroniccircuit or circuits being flush with the upper surface of said firstnose, means for holding (15, 11) said electronic circuit or circuitswithin said positioning means, second positioning and holding means(10C, 11B; 16; 18) for a coil core (23; 26) or for a winding (24), saidfirst and second positioning means being arranged in such a way that aspace remains between said electronic circuits and between theelectronic circuit close to the coil core or to the winding and saidcoil core or said winding, and guide means for a winding wire. 9.Holding tool according to claim 8 , characterized in that the guidemeans are composed of a single point (17) disposed on a rear portion ofa nose of said tool in order to guide the wire above one or more firstmetal paths of one or more electronic circuits, then after the windinghas been carried out, above one or more second metal paths of saidelectronic circuit or circuits.
 10. Holding tool according to claim 8 ,characterized in that the guide means are composed of a single point(17) disposed on a rear portion of a nose of said tool in order to guidethe wire above one or more first metal paths of one or more electroniccircuits, then after the winding has been carried out, above one or moresecond metal paths of said electronic circuit or circuits.
 11. Holdingtool according to one of the claims 9 or 10, characterized in that itfurther comprises other guide means (19, 26A) disposed at the entry andat the exit of the winding.
 12. Component produced particularly in thecourse of a process according to one of the claims 1 to 7 ,characterized in that the electronic circuit or circuits and the windingare connected only by the ends of the winding wires soldered on themetal paths of said electronic circuit or circuits.
 13. Componentaccording to claim 12 , characterized in that it is subsequentlyinserted into a glass tube (30) to be sealed there.
 14. Componentaccording to claim 12 , characterized in that it is subsequently coveredpartially or totally by a fixing coating (34).
 15. Component accordingto claim 12 , characterized in that it is subsequently fixed on a rigidsupport (33).
 16. Component according to claim 12 , characterized inthat it is subsequently placed between two portions (35A, 35B) of atleast one thin sheet of synthetic material forming an envelope, the freeedges (36) of said portions of sheet subsequently being sealed together.17. Component according to claim 12 , characterized in that a pluralityof said components are disposed side by side, a free space subsistingbetween each of said components, between two parallel strips (35A, 35B)of a thin synthetic material, a sealing (36) of the two strips beingproduced about each of said components in order to form an envelope. 18.Component according to claim 17 , characterized in that each componentis separated from the others by cutting said strips along a linesituated between two consecutive sealings disposed in said free space.19. Component according to one of the claims 17 to 18 , characterized inthat its envelope comprises fixing means (37) disposed outside of thesealed part of the envelope.
 20. Component according to claim 12 ,characterized in that the electronic circuit or circuits are forced backinto the plane of the winding.
 21. Component according to one of theclaims 12 or 20, characterized in that the electronic circuit orcircuits are forced back into the space disposed within the winding. 22.Component according to claim 20 or 21 , characterized in that thecomponent is intercalated between two sheets of synthetic materialassembled together.
 23. Component according to claim 12 , characterizedin that the electronic circuit or circuits are forced back against aflange of the winding core (26).
 24. Component according to claim 23 ,characterized in that the electronic circuit or circuits are gluedagainst the flange of the winding core.